From CHANGELOG
-- Added a whole bunch of new OS fingerprints (and adjustments)
ranging from big important ones (Linux 2.4.X, OpenBSD 2.9, FreeBSD
4.3, Cisco 12.2.1, MacOS X, etc) to some that are more obscure (
such as Apple Color LaserWriter 12/660 PS and VirtualAccess
LinxpeedPro 120 )
-- Added "All zeros" IP.ID sequence classification to account for the
new Linux 2.4 scheme which seems to use 0 whenever the DF bit is
set (probably a good idea).
-- Tweaked TCP Timestamp and IP.ID sequence classification algorithms
f0b58e08f6